I saw a post somewhere in these forums, telling of a deal, whereby if you add at least $40 to your gift card balance during Prime Days, an extra $10 value would be added to that balance. As a result, I added $40 to my balance. An extra $10 was "gifted" me, but not in a very straightforward manner. As far as I can make out, there are certain items which, if I add them to my cart and then checkout, $10 will be deducted as part of the checkout process. It appears on the right hand side of the screen, marked as "GC Prime Day Credit".
The problem I'm having is that this credit is only applied to certain items. There doesn't appear to be any way to tell in advance which items it will be applied to. I called customer service, and the agent gave a broad, evasive answer.
In other words, as far as I can tell, I just have to carry on shopping as normal on Amazon, and hope that the GC Prime Day Credit is applied to one of my items before it expires at the end of November. Unless there is a way to identify which items the discount applies to, this comes across as a particularly sneaky way to do business. Currently, the only item I have found which qualifies for the credit, is a tube of rearview mirror windshield adhesive. If my rearview mirror falls off before the end of November, this will be useful. Otherwise...........